high compression fuel management setups...

[URM S14]

well a high compression KA24DE is an ever growing passion ive noticed in this forum and i think for many of us that will do it, our fuel management recourses are pretty limited due to the sr20 craze.so we already know that theres the $2000 AEM unit but what are our other options and what has been tried and trued for 11:1+ compression? any experiences or knowledge are more than helpful.

-Chris

[eddiec]

megasquirt is an option. its cheap, tunable and the tech support is phenomenal. catch is you have to build it yourself.

[deviousKA]

My vote goes for megasquirt as well, if your wanting a standalone type system.

Build it yourself and you can save around $100, pre built and tested megasquirt ecus sell for $250. I assembled mine myself for around $160 total. I would recommend anyone with an MS ecu to buy/build the stimulator as well.

For that price it makes just about any piggyback a waste of money, and is definately comparible to $1000+ standalone units like AEM imho. The flexibility of the MS is unrivaled, you can set it up to do just about anything.

As for setting any alternate ecu system up on your high compression ka, tuning will be involved. A wideband o2 sensor is a definate need, but for the money you save with going megasquirt standalone, a good o2 sensor setup wont break the bank. Thats just my opinion.

My efi/tuning setup:MS v2.2 ecu with dual table extra codeDistributorless EDIS modifications1991 ford escort edis4 system with custom trigger wheelTechedge wideband o2 Cheap oldschool gateway laptop/Ibm palm pilot

After wiring and setting all the correct constants and initial tables in my ecu (just following instructions), car started first try. Idles at stoich and is rich at any higher level, a perfect start.

Im building another one for my 510.

[URM S14]

MegaSquirt..never seen that for sale anywhere. it sounds like a great alternative though. Im not electronicaly inclined so how would i go about making a base map or even tuning that dam thing? is there a tuning guide or manual or should i pick up some engine and tuning books?id like to do about 11-12:1 compression with maybe some ITB's down the line but thats just an idea. Still looking around for a good set of cams. The crower/enjuku selection is quite a fresh breath of air from the 5 selections of durarions/lifts. and the price is also good. Deviouska-would you also mind shedding somemore light the ITB setup i see. was it a good gain when installed and how was tuning with them?

[deviousKA]

http://www.msefi.com is the link to all megasquirt info, guides etc.. You can find out all you need to know there.

A basic "basemap" creator is in the tuning software. Just type in your displacement, injector size, etc.. and maps will be created to get you started. Other constant settings need to be set but its all in the guides.

My ITB setup has shown great gains so far in the low end, I have not yet gotten to do much high end run/tune. As far as ease of install and setup, quite easy. Fabricating all the parts/wiring/planning etc, took a few months of my spare time but came together in one day to run the car.

The new crower selection is nice indeed.

[deviousKA]

An un-flattering photograph



more process pictures


Modified by deviousKA at 5:03 AM 3/3/2005

[PandaS14]

My vote is for MS too.

I'm also going to be running MS. Basically the same setup as DeviousKA, I'm a copy cat. But mine's a dohc. V2.2 also with EDIS4 but I don't have the WB02 yet, in a couple months I'm gonna build it. Just finished building the MS and now I'm doing wiring and base tune etc. It's really not that hard, if you are good at following directions. However, it does seem very daunting at first.

Pic of the assembled MS:

[URM S14]

this is definatly a good find, thanks guys. Devious-the ITBs are lookin good,must be such a fun car to drive. any plans to dyno anytime?

[BlalockStevens]

Sorry to bump a semi old thread but I figured it might be beneficial for others to see it as well.

Can you two guys who are running MS with EDIS post pics of how you mounted the crank trigger wheel and pickup sensor? I will more than likely be running the same setup on my DE-T and I was curious as to how that was accomplished.

Also, did you use all new sensors or tap into the existing Nissan sensors (IAT, CLT, etc)? Thanks.

[PandaS14]

My crank pulley is being machined as we speak, so no pics yet. Devious has a good pic of his tho. Mounted trigger (VR) sensor from top 2 boltholes where A/C was. I'm gonna be doing it like that too.

I'm using OEM CLT sensor, and GSXR TPS and AIT sensor. Just have to calibrate for these sensors instead of using GM sensors. Much easier.

[BlalockStevens]

I still have AC so that might not work. Thanks though.

I saw in another thread where Devious said he used the Suzuki sensors, so I will definitely look into those. I didn't see the pic of his crank pulley setup though. Maybe he can chime in.

Any particular reason you didn't use the OEM TPS?

[thekage]

Pic of the assembled MS:

Nice dvd player.. i got one in my bedroom cant beat 40 bucks at walmart!

Im really interested in the MS.. thanks for bringing up this thread.. ive been reading the forum there all day now!

[deviousKA]

been real busy lately.

heres a picture of my triggerwheel and sensor setup. The backside ac portion of crank pulley is machined for the wheel and shrink fit. Bracket for sensor extends from top two AC bolt locations, just some square bar with a plate on the end. Thats a ford escort vr sensor and 36-1 wheel.

[PandaS14]

using Suzuki TPS cause it's already on the TB's I'm using. Making OEM one fit would be a pain in the ***, and there's no reason to do it because there is just as much setup (not much) to get MS to read the Suzuki TPS as our OEM one.

[BlalockStevens]

heres a picture of my triggerwheel and sensor setup. The backside ac portion of crank pulley is machined for the wheel and shrink fit. Bracket for sensor extends from top two AC bolt locations, just some square bar with a plate on the end. Thats a ford escort vr sensor and 36-1 wheel.

That's pretty slick. I assume by shrink fit you mean an interference fit (heat wheel and/or freeze pulley, press on). I unfortunately want to keep my AC so I'll have to find a slightly different solution. Thanks a lot for the help though.

Quote »using Suzuki TPS cause it's already on the TB's I'm using. Making OEM one fit would be a pain in the ***, and there's no reason to do it because there is just as much setup (not much) to get MS to read the Suzuki TPS as our OEM one.[/quote]Ok, so there's no problem using the OEM one. That's probably what I'll do then. Thanks.